Umbrella holder



FIG. 1 is a perspective view of an umbrella holder showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the figures depict portions of the umbrella holder that form no part of the claimed design. 

The ornamental design for an umbrella holder, as shown and described. 